—IsTomin the next room?
—Well,it’s hard tosay.ButIheardhim loudly whenIpassed by justnow.
A. speak
B. tospeak
C. spoken
D. speaking
网友回答
A. speak
B. tospeak
C. spoken
(答案→)D. speaking
解析：考查非谓语动词的用法。hear sb do sth“听到某人做某事”，所听到的某人所做动作一般是完整的，或者是瞬间动词；根据后面的“whenIpassed by just now” 可知，所听到的动作当时正在进行，应该使用hear sb. doing sth“听到某人正在做某事”。